:root {
  --background-color: #2c3e50;
  --line-color: #667c8e;
  --border-color: #7591ad;
  --text-color: #34495e;
}

* {
  margin: 0;
  padding: 0;
}

html {
  font-size: 14px;
}

body {
  width: 100vw;
  height: 100vh;
  background-color: var(--background-color);
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  font-family: Shijie;
}

ul{
  width: 300px;
  height: 90px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

li{
  position: relative;
  list-style: none;
}

li .iconfont{
  font-size: 50px;
  color: #51708f;
}

li::before{
  position: absolute;
  top: 0;
  height: 0;
  font-family: "iconfont" !important;
  font-size: 50px;
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* background-color: var(--background-color); */
  border-bottom: 4px solid;
  overflow: hidden;
  transition: 0.2s ease-in-out;
}

li:nth-child(1)::before{
  color:orange;
  content: "\e60d";
}

li:nth-child(2)::before{
  color:palevioletred;
  content: "\e601";
}

li:nth-child(3)::before{
  color:green;
  content: "\e611";
}

li:hover::before{
  height: 100%;
}

